Merging upstream version 6.9.2.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

3 files changed, 0 insertions, 231 deletions

diff --git a/arch/s390/include/asm/fpu/api.h b/arch/s390/include/asm/fpu/api.h
deleted file mode 100644
index d6ca8bc6ca..0000000000
--- a/arch/s390/include/asm/fpu/api.h
+++ /dev/null
@@ -1,126 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * In-kernel FPU support functions
- *
- *
- * Consider these guidelines before using in-kernel FPU functions:
- *
- *  1. Use kernel_fpu_begin() and kernel_fpu_end() to enclose all in-kernel
- *     use of floating-point or vector registers and instructions.
- *
- *  2. For kernel_fpu_begin(), specify the vector register range you want to
- *     use with the KERNEL_VXR_* constants. Consider these usage guidelines:
- *
- *     a) If your function typically runs in process-context, use the lower
- *	  half of the vector registers, for example, specify KERNEL_VXR_LOW.
- *     b) If your function typically runs in soft-irq or hard-irq context,
- *	  prefer using the upper half of the vector registers, for example,
- *	  specify KERNEL_VXR_HIGH.
- *
- *     If you adhere to these guidelines, an interrupted process context
- *     does not require to save and restore vector registers because of
- *     disjoint register ranges.
- *
- *     Also note that the __kernel_fpu_begin()/__kernel_fpu_end() functions
- *     includes logic to save and restore up to 16 vector registers at once.
- *
- *  3. You can nest kernel_fpu_begin()/kernel_fpu_end() by using different
- *     struct kernel_fpu states.  Vector registers that are in use by outer
- *     levels are saved and restored.  You can minimize the save and restore
- *     effort by choosing disjoint vector register ranges.
- *
- *  5. To use vector floating-point instructions, specify the KERNEL_FPC
- *     flag to save and restore floating-point controls in addition to any
- *     vector register range.
- *
- *  6. To use floating-point registers and instructions only, specify the
- *     KERNEL_FPR flag.  This flag triggers a save and restore of vector
- *     registers V0 to V15 and floating-point controls.
- *
- * Copyright IBM Corp. 2015
- * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
- */
-
-#ifndef _ASM_S390_FPU_API_H
-#define _ASM_S390_FPU_API_H
-
-#include <linux/preempt.h>
-#include <asm/asm-extable.h>
-#include <asm/fpu/internal.h>
-
-void save_fpu_regs(void);
-void load_fpu_regs(void);
-void __load_fpu_regs(void);
-
-/**
- * sfpc_safe - Set floating point control register safely.
- * @fpc: new value for floating point control register
- *
- * Set floating point control register. This may lead to an exception,
- * since a saved value may have been modified by user space (ptrace,
- * signal return, kvm registers) to an invalid value. In such a case
- * set the floating point control register to zero.
- */
-static inline void sfpc_safe(u32 fpc)
-{
-	asm volatile("\n"
-		"0:	sfpc	%[fpc]\n"
-		"1:	nopr	%%r7\n"
-		".pushsection .fixup, \"ax\"\n"
-		"2:	lghi	%[fpc],0\n"
-		"	jg	0b\n"
-		".popsection\n"
-		EX_TABLE(1b, 2b)
-		: [fpc] "+d" (fpc)
-		: : "memory");
-}
-
-#define KERNEL_FPC		1
-#define KERNEL_VXR_V0V7		2
-#define KERNEL_VXR_V8V15	4
-#define KERNEL_VXR_V16V23	8
-#define KERNEL_VXR_V24V31	16
-
-#define KERNEL_VXR_LOW		(KERNEL_VXR_V0V7|KERNEL_VXR_V8V15)
-#define KERNEL_VXR_MID		(KERNEL_VXR_V8V15|KERNEL_VXR_V16V23)
-#define KERNEL_VXR_HIGH		(KERNEL_VXR_V16V23|KERNEL_VXR_V24V31)
-
-#define KERNEL_VXR		(KERNEL_VXR_LOW|KERNEL_VXR_HIGH)
-#define KERNEL_FPR		(KERNEL_FPC|KERNEL_VXR_LOW)
-
-struct kernel_fpu;
-
-/*
- * Note the functions below must be called with preemption disabled.
- * Do not enable preemption before calling __kernel_fpu_end() to prevent
- * an corruption of an existing kernel FPU state.
- *
- * Prefer using the kernel_fpu_begin()/kernel_fpu_end() pair of functions.
- */
-void __kernel_fpu_begin(struct kernel_fpu *state, u32 flags);
-void __kernel_fpu_end(struct kernel_fpu *state, u32 flags);
-
-
-static inline void kernel_fpu_begin(struct kernel_fpu *state, u32 flags)
-{
-	preempt_disable();
-	state->mask = S390_lowcore.fpu_flags;
-	if (!test_cpu_flag(CIF_FPU))
-		/* Save user space FPU state and register contents */
-		save_fpu_regs();
-	else if (state->mask & flags)
-		/* Save FPU/vector register in-use by the kernel */
-		__kernel_fpu_begin(state, flags);
-	S390_lowcore.fpu_flags |= flags;
-}
-
-static inline void kernel_fpu_end(struct kernel_fpu *state, u32 flags)
-{
-	S390_lowcore.fpu_flags = state->mask;
-	if (state->mask & flags)
-		/* Restore FPU/vector register in-use by the kernel */
-		__kernel_fpu_end(state, flags);
-	preempt_enable();
-}
-
-#endif /* _ASM_S390_FPU_API_H */
diff --git a/arch/s390/include/asm/fpu/internal.h b/arch/s390/include/asm/fpu/internal.h
deleted file mode 100644
index d511c4cf5a..0000000000
--- a/arch/s390/include/asm/fpu/internal.h
+++ /dev/null
@@ -1,67 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * FPU state and register content conversion primitives
- *
- * Copyright IBM Corp. 2015
- * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
- */
-
-#ifndef _ASM_S390_FPU_INTERNAL_H
-#define _ASM_S390_FPU_INTERNAL_H
-
-#include <linux/string.h>
-#include <asm/facility.h>
-#include <asm/fpu/types.h>
-
-static inline bool cpu_has_vx(void)
-{
-	return likely(test_facility(129));
-}
-
-static inline void save_vx_regs(__vector128 *vxrs)
-{
-	asm volatile(
-		"	la	1,%0\n"
-		"	.word	0xe70f,0x1000,0x003e\n"	/* vstm 0,15,0(1) */
-		"	.word	0xe70f,0x1100,0x0c3e\n"	/* vstm 16,31,256(1) */
-		: "=Q" (*(struct vx_array *) vxrs) : : "1");
-}
-
-static inline void convert_vx_to_fp(freg_t *fprs, __vector128 *vxrs)
-{
-	int i;
-
-	for (i = 0; i < __NUM_FPRS; i++)
-		fprs[i].ui = vxrs[i].high;
-}
-
-static inline void convert_fp_to_vx(__vector128 *vxrs, freg_t *fprs)
-{
-	int i;
-
-	for (i = 0; i < __NUM_FPRS; i++)
-		vxrs[i].high = fprs[i].ui;
-}
-
-static inline void fpregs_store(_s390_fp_regs *fpregs, struct fpu *fpu)
-{
-	fpregs->pad = 0;
-	fpregs->fpc = fpu->fpc;
-	if (cpu_has_vx())
-		convert_vx_to_fp((freg_t *)&fpregs->fprs, fpu->vxrs);
-	else
-		memcpy((freg_t *)&fpregs->fprs, fpu->fprs,
-		       sizeof(fpregs->fprs));
-}
-
-static inline void fpregs_load(_s390_fp_regs *fpregs, struct fpu *fpu)
-{
-	fpu->fpc = fpregs->fpc;
-	if (cpu_has_vx())
-		convert_fp_to_vx(fpu->vxrs, (freg_t *)&fpregs->fprs);
-	else
-		memcpy(fpu->fprs, (freg_t *)&fpregs->fprs,
-		       sizeof(fpregs->fprs));
-}
-
-#endif /* _ASM_S390_FPU_INTERNAL_H */
diff --git a/arch/s390/include/asm/fpu/types.h b/arch/s390/include/asm/fpu/types.h
deleted file mode 100644
index d889e94368..0000000000
--- a/arch/s390/include/asm/fpu/types.h
+++ /dev/null
@@ -1,38 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * FPU data structures
- *
- * Copyright IBM Corp. 2015
- * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
- */
-
-#ifndef _ASM_S390_FPU_TYPES_H
-#define _ASM_S390_FPU_TYPES_H
-
-#include <asm/sigcontext.h>
-
-struct fpu {
-	__u32 fpc;		/* Floating-point control */
-	void *regs;		/* Pointer to the current save area */
-	union {
-		/* Floating-point register save area */
-		freg_t fprs[__NUM_FPRS];
-		/* Vector register save area */
-		__vector128 vxrs[__NUM_VXRS];
-	};
-};
-
-/* VX array structure for address operand constraints in inline assemblies */
-struct vx_array { __vector128 _[__NUM_VXRS]; };
-
-/* In-kernel FPU state structure */
-struct kernel_fpu {
-	u32	    mask;
-	u32	    fpc;
-	union {
-		freg_t fprs[__NUM_FPRS];
-		__vector128 vxrs[__NUM_VXRS];
-	};
-};
-
-#endif /* _ASM_S390_FPU_TYPES_H */